09 23 09 Notes

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09 23 09 Notes

  1. 1. Biology and Human Concerns 09/23/09 – Notes Dissociation of water molecules -At 25oC about 1.0x10-7M of each ion exist pH scale: page 27 pH -> concentration of hydrogen ions big number, small concentration of hydrogen ions small number, big concentration of hydrogen ions Page 32-34 Macromolecules Organic Chemistry: Carbon atoms are the most versatile building blocks of molecules. Carbon can build any molecule to do any job. Organic Valences: Hydrogen needs to form 1 covalent bond Biology-“valence of 2” Chem-“outer e shell”. Organic chemistry allows us to build organic molecules out of carbons to allow us to build any shape necessary. Hydrocarbon Diversity: -Carbons can be built into different molecules. Isomers: -Structural isomers -Geometric isomers (“Cis isomer”) -Enantiomers – mirror image isomer

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